- This topic has 4 replies, 2 voices, and was last updated 2 years, 2 months ago by
nik.paprocki.
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July 6, 2021 at 11:45 am #79696
mackenzie fency
MemberHi:
recently I uesd optisystem to build a CO-OFDM system with FSO channel, but I cannot get the OSNR and the constellation.
About the OSNR, the optical power meter after the FSO channel shows the noise power equals zero.
About the constellation, I dont know how to show the constellation after the OFDM demodulator. I see someone used a subsystem to show constellation, but I dont know what the subsystem has. Is it another communication system? -
July 7, 2021 at 11:25 am #80153
Ahmad Atieh
ModeratorDear Mackenzie,
You may access the Constellation of the OFDM Demodulator through the Project Browser as shown in the attached image. You can measure the OSNR using the WDM Analyzer Visualizer at Default/Visualizer Library/Optical/
Regards,
Ahmad -
July 7, 2021 at 11:25 am #82757
Ahmad Atieh
ModeratorDear Mackenzie,
You may access the Constellation of the OFDM Demodulator through the Project Browser as shown in the attached image. You can measure the OSNR using the WDM Analyzer Visualizer at Default/Visualizer Library/Optical/
Regards,
Ahmad -
July 9, 2021 at 7:54 am #80155
Zella Kroger
MemberDear Ahmad:
Wow, it works! Thank u so much Mr. Atieh!
But after I used WDM analyzer, there still one question:
I used QPSK to build OFDM system, and the WDM analyzer always tells me signal power equals 0. Is this because of QPSK or because I used only one wavelength?
If there is an offense, please forgive me.
Mackenzie -
July 9, 2021 at 7:54 am #82759
Zella Kroger
MemberDear Ahmad:
Wow, it works! Thank u so much Mr. Atieh!
But after I used WDM analyzer, there still one question:
I used QPSK to build OFDM system, and the WDM analyzer always tells me signal power equals 0. Is this because of QPSK or because I used only one wavelength?
If there is an offense, please forgive me.
Mackenzie -
July 9, 2021 at 1:00 pm #80157
Ahmad Atieh
ModeratorDear Mackenzie,
there is no offense.
I am not sure what the settings for the component in your project are. So, I can’t comment. However, you may place a power meter at the same port and check the power. You may email me your project as a zip file to ahmad.atieh@optiwave.com and I would check it out and comment.
Meanwhile, please let me know which version of OptiSystem are you using and your affiliation.
Regards,
Ahmad -
July 9, 2021 at 1:00 pm #82761
Ahmad Atieh
ModeratorDear Mackenzie,
there is no offense.
I am not sure what the settings for the component in your project are. So, I can’t comment. However, you may place a power meter at the same port and check the power. You may email me your project as a zip file to ahmad.atieh@optiwave.com and I would check it out and comment.
Meanwhile, please let me know which version of OptiSystem are you using and your affiliation.
Regards,
Ahmad -
July 14, 2021 at 8:19 am #80173
Zella Kroger
Memberokay, thank u Mr. Atieh!
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July 14, 2021 at 8:19 am #82777
Zella Kroger
Memberokay, thank u Mr. Atieh!
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